But are you arguing that, yea, verily, this article's foundational assumption is true and correct: Magnesium deficiency is the sole or prime cause of all (or virtually all) modern depression?
If so, I think you need to back that up with a whole lot more than a paragraph or two about things you've read, like a long list of citations that not only show the role magnesium plays, but also another long list of citations that affirmatively excludes myriad other potential causes of Major Depression that are generally understood to be contributing factors.